Nice!!
@North Coast Miller are you following a specific program? or just planning day by day?
Your hypertrophy results are always pretty remarkable!
Currently I'm feeling it out a little as I go to get it fine tuned. Jumping modes like this means some of the TUT , recovery needs, things like that are sort of a mystery, but not completely. There really isn't a lot out there for iso programming like this - a lot of it recommend stuff that I personally don't - long, long duration holds, submax efforts, single exertions, dynamic resistance (where you're straining two somewhat equal muscle groups against each other). But I'm not a complete stranger to any of it and have a lot of my own ideas re best practices for given goals. For the amount of clinical research on Iso (a virtual treasure trove!), there are remarkably few "programs" for it aside from street gymnastic stuff. A big part of this is the lack of standardized training gear.
I always begin with a very basic DeLorme inspired push/pull/hinge/squat with abs and bi/tri as icing on the cake. Doesn't matter what mode I'm using. The approach I've settled on currently is a product of mulling over research, my past results, chewing on other approaches I've dabbled with and what I suspected might be a better way. So far the only thing I might change as I get dialed in is chopping off the 5th exertion if it isn't needed - keeping it for now.
After all these years of training I've managed to keep my physique and strength pinned at a pretty good baseline level and have just been trying different approaches to see what the effect is. If I see I'm going down an ineffective alley, I'll fall back on something I know works and cut the experiment short.
I'm coming off about a 12-16 week (have to check my logs) block of heavy sandbag Clusters and really needed to change gears. I put on good mass and managed to equal my working loads of 2 years ago when I was over 10 lbs heavier, but was starting to feel a little beat-up.
The interesting thing about that "progress pic" I took right after training, if I waited till this afternoon I'd look bigger. My t-shirt was absolutely soaked and I'd lost about 2lbs water weight with no "pump". Isometrics are like that, everything is delayed. I'm really going to take a deep dive this time, the new training gear, simple as it is, is so much more effective than anything I've used before for isometric-only training. I'm stoked!